ELBOW ASSEM. 5S3366 - Caterpillar

Illustration 1 g03318532
Pull out on switch (1) in order to release the switch. Note: Button (2) is the circuit breaker reset for the electric fuel priming pump. Push in the button in order to reset the circuit breaker. If the electrical system is working properly, the button will remain depressed. If the button does not remain depressed, check the electrical circuit for the electric fuel priming pump. Repair the electrical circuit, if necessary.
As the air is purged from the fuel system, fuel pressure will increase. Listen for the priming pump to come under load. Do not continue priming the fuel system after the priming pump is under load. Do not operate the pump for more than 2 minutes.
Start the engine.
If the engine starts but the engine runs rough, continue to run the engine at low idle until the engine runs smoothly.
If the engine does not start after several attempts, refer to Special instruction, SEHS9586, "3500 Electronic Unit Injection (EUI) Fuel Priming Procedure" or consult your Caterpillar dealer.